Dalager Tina, Bredahl Thomas G V, Pedersen Mogens T, Boyle Eleanor, Andersen Lars L, Sjøgaard Gisela
Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.
Department of Nutrition, Exercise and Sports, University of Copenhagen, Denmark.
Man Ther. 2015 Oct;20(5):657-65. doi: 10.1016/j.math.2015.01.016. Epub 2015 Feb 28.
The aim was to determine the effect of one weekly hour of specific strength training within working hours, performed with the same total training volume but with different training frequencies and durations, or with different levels of supervision, on compliance, muscle health and performance, behavior and work performance. In total, 573 office workers were cluster-randomized to: 1 WS: one 60-min supervised session/week, 3 WS: three 20-min supervised sessions/week, 9 WS: nine 7-min supervised sessions/week, 3 MS: three 20-min sessions/week with minimal supervision, or REF: a reference group without training. Outcomes were diary-based compliance, total training volume, muscle performance and questionnaire-based health, behavior and work performance. Comparisons were made among the WS training groups and between 3 WS and 3 MS. If no difference, training groups were collapsed (TG) and compared with REF. Results demonstrated similar degrees of compliance, mean(range) of 39(33-44)%, and total training volume, 13.266(11.977-15.096)kg. Musculoskeletal pain in neck and shoulders were reduced with approx. 50% in TG, which was significant compared with REF. Only the training groups improved significantly their muscle strength 8(4-13)% and endurance 27(12-37)%, both being significant compared with REF. No change in workability, productivity or self-rated health was demonstrated. Secondary analysis showed exercise self-efficacy to be a significant predictor of compliance. Regardless of training schedule and supervision, similar degrees of compliance were shown together with reduced musculoskeletal pain and improved muscle performance. These findings provide evidence that a great degree of flexibility is legitimate for companies in planning future implementation of physical exercise programs at the workplace. ClinicalTrials.gov, number NCT01027390.
目的是确定在工作时间内每周进行一小时特定强度训练的效果，训练总量相同但训练频率、时长不同，或监督水平不同，对依从性、肌肉健康与表现、行为及工作绩效的影响。总共573名办公室职员被整群随机分为：1WS组：每周1次60分钟的监督训练课程；3WS组：每周3次20分钟的监督训练课程；9WS组：每周9次7分钟的监督训练课程；3MS组：每周3次20分钟的最低监督训练课程；或REF组：无训练的参照组。结局指标为基于日记的依从性、总训练量、肌肉表现以及基于问卷的健康、行为和工作绩效。对WS训练组之间以及3WS组与3MS组进行比较。若无异，则将训练组合并为训练组（TG）并与REF组比较。结果显示依从性程度相似，平均（范围）为39%（33%-44%），总训练量为13.266（11.977-15.096）千克。TG组颈部和肩部的肌肉骨骼疼痛减轻了约50%，与REF组相比具有显著性。仅训练组的肌肉力量显著提高了8%（4%-13%），耐力提高了27%（12%-37%），与REF组相比均具有显著性。工作能力、生产力或自评健康状况未显示变化。二次分析表明运动自我效能是依从性的显著预测因素。无论训练计划和监督情况如何，均显示出相似程度的依从性，同时肌肉骨骼疼痛减轻，肌肉表现改善。这些发现为公司在规划未来在工作场所实施体育锻炼计划时具有很大的灵活性提供了证据。ClinicalTrials.gov注册号：NCT01027390。
